The source problem was a hidden file found in the device that records the position of users. Using a software application, a map of movements can be generated. The file doesn’t have any impact if the localisation services settings are disabled. This was discovered by a two security researchers Alasdair Allan and Pete Warden.

They confirm that a hidden permanent file stores localisation information during the last year since iOS 4 was released. The name file is “consolidated.db”. Every one can disabled this function by updating his device. There is no conspiracy in this job. The gaol of the file was to collect information to develop the next generation of iPhone and iPad for the two next years, Apple said.